Below are 4 Lewis Structures for CO2. Only ONE of them is correct. Identify the correct one, and explain why it is correct. For each of the three incorrect ones, explain why they are incorrect.

Answer:
B.
Explanation:
Carbon = 4
Oxygen = 6x 2
Total e- = 16 - 4 ( the number of initial single bonds)
Final number of available e- = 12
The total number of available electrons is 12 and is distributed to oxygen atoms having 6 e- each. To make C octet each oxygen atoms donates its pair of electrons to form another bond. So we have a double bond on each side making C octet and two O atoms.